Caps, Screw Top, with Tan Silicone Rubber / PTFE Pre-Slit Septa, bonded in "knurled", polypropylene, Blue Caps. For use with 9-425mm thread, 12x32mm autosampler vials, AQ Brand. 100/PK.
Pre-slit for easy penetration by autosampler needles and to prevent "Septa Plunge". Recommended for Waters® Alliance & Acquity instruments. Ultra-pure Silicone Rubber is a natural Tan color and will not extract pigments. Use this Cap for excellent results in LCMS/MS. Compare to “HPLC Certified” brands.
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